Panasonic K1HY04YY0106 USB connection cable is a cable for charging a compatible camera. Panasonic’s DC-G100 manual identifies this exact part number as a camera accessory and shows how it connects with the camera’s USB/CHARGE socket and an AC adaptor.
The cable is also described for connecting the camera to a USB device, such as a PC, to charge the battery. This makes it useful for the charging methods covered in the manual. The confirmed purpose here is camera charging; connector dimensions and other device compatibility details are not specified in the cited documentation.